RAS Academician V.E.Alemasov's School-Workshop for young scientists and specialists

Problems of heat-mass transfer and hydrodynamics

in power-mechanical engineering

(Kazan, Russia, September 16-18, 2008)

V.N.Shlyannikov, N.I.Mikheev, V.M.Molochnikov, O.A.Dushina

Research Center of Power Engineering Problems, KSC of RAS

The 6^th RAS Academician V.E.Alemasov's School-Workshop for young scientists and specialists "Problems of heat-mass transfer and hydrodynamics in power and mechanical engineering" took place in Kazan on September 16-18, 2008. The School was organized by: Kazan Scientific Center of Russian Academy of Sciences (KSC RAS), Research Center of Power Engineering Problems (RCPEP) of KSC RAS, Moscow Power Engineering Institute (Technical University) (MPEI), A.N.Tupolev Kazan State Technical University (KSTU), and Mechanics and Engineering Institute (MEI) of KSC RAS. 169 participants submitted 108 papers 81 of which were delivered at plenary meeting and at the sections. The School was attended by the guests from many regions of Russia and the neighboring countries: MPEI (Moscow), Moscow Aviation Institute (State Technical University), S.S.Kutateladze Thermophysics Institute of Siberian branch (SB) of RAS (Novosibirsk), A.S.Khristianovich Institute of Theoretical and Applied Mechanics (ITAM) SB RAS (Novosibirsk), Siberian Federal University (Krasnoyarsk), Engels Technology Institute (branch of Saratov State Technical University), L.A.Melentyev Institute of Power Engineering Systems of SB RAS (Irkutsk), D.F.Ustinov Baltic State Technical University (Saint-Petersburg), Ulyanovsk State Technical University, Ighevsk State Technical University, Dnepropetrovsk National University (Ukraine), M.S.Osimi Tajik Technical University, S.Ainy Tajik State Pedagogy Institute (Tajikistan).

At the commencement meeting of the 6^th School-Workshop the welcoming speeches were delivered by Chairman of KSC RAS, Academician O.G.Sinyashin, co-chairmen V.N.Shlyannikov (Director of RCPEP KSC RAS) and Yu.F.Gortyshov (Rector of A.N.Tupolev KSTU). V.E.Alemasov's spouse N.A.Alemasova told about creative life of the eminent Scientist, about his unfailing attention towards young scientists.

The School was established in 1999 on Academician V.E.Alemasov's initiative by A.N.Tupolev Kazan State Technical University, Power Engineering Department of KSC RAS, and Mechanics and Engineering Institute of KSC RAS. In October 2000 during the second School the decision was made to conduct the School-Workshop regularly once in two years. Among its principal objects was to attract young people to scientific work and make favorable conditions for their creative development and expansion of contacts between young and mature scientists.

It is no mere chance that the School on heat and mass transfer and hydrodynamics is conducted in Kazan. It is in Kazan where scientific-pedagogic school on heat and power engineering and propulsion engineering has successfully formed and developed for many years. The branch was founded by famous Russian scientists S.V.Rumyantsev, V.P.Glushko, A.V.Bolgarskiy, and G.S.Ghiritskiy and further developed by RAS Academician Vyacheslav Evgenyevich Alemasov.

Vyacheslav Evgenyevich Alemasov was an eminent scientist in the field of heat and power engineering and propulsion engineering. His works on calculation and research of thermodynamic and thermophysical properties of combustion products (complex homogenous and heterogeneous mixtures) are of fundamental importance. V.E.Alemasov took an active and leading part in development of fundamental reference book (in 10 volumes) which became a part of the system of thermodynamic database covering individual substances and combustion products developed at the USSR Academy of Sciences under the direction of Academician V.P.Glushko. In 1984 all authors of this work including the scientists from Kazan Aviation Institute V.E.Alemasov, A.F.Dregalin, and A.P.Tishin were awarded with the USSR National Prize in the field of science and engineering.

V.E.Alemasov also dealt with the theory of rocket engines on chemical fuel. In collaboration with his followers he developed original and rigorous calculation techniques for complex thermal processes in units of rocket engines. Being implemented in modern mathematical support these techniques have been widely applied in the area of scientific research and design. Results of this work were published in a number of monographs and in a textbook for higher schools which was repeatedly reissued (1962, 1969, 1980, 1989). In 1991 for his work in this field V.E.Alemasov was rewarded with his second USSR National Prize. His great services in the area of rocket engineering are evidenced by the fact that he was elected a full member of International Astronautics Academy. In 2000 V.E.Alemasov was included in the list of 2000 outstanding scientists of the 20^th century.

Commencement and plenary meetings of the 6^th School-Workshop were conducted at the conference hall of Kazan Scientific Center of RAS. The following invited papers were delivered: "Heat Transfer Enhancement Efficiency in Heat Exchangers" (by I.A.Popov, Candidate of technical sciences, Associate Professor at KSTU), "Mathematical Packages and the Problem of Knowledge Transfer" (V.F.Ochkov, Dr. tech. sci., Head of department at Moscow Power Engineering Institute), "Combustion in Supersonic Flows. Control of Flows with Power Supply" (P.K.Tretyakov, Dr. tech. sci., Head of laboratory of supersonic combustion at A.S.Khristianovich ITAM SB RAS).

I.A.Popov delivered an extensive analysis of evaluation methods of heat transfer intensifiers of different types. He also summarized up-to-date numerical and experimental research results concerning expediency of heat transfer enhancement in a number of power heat exchangers.

V.F.Ochkov considered the problems of application of mathematical packages for improvement of students teaching by implementation of open calculations in Internet. Internet version of reference database "Heat Power Engineering" which has an open (free) access at MPEI server was cited as an example.

P.K.Tretyakov submitted research results concerning enhancement of combustion efficiency in supersonic flows, particularly for application to high-speed ramjet design, aerodynamic drag reduction and guiding forces formation on aircraft surface. Possibilities were demonstrated to control supersonic flow using local heat sources in the form of powerful optical pulsating discharge.

In what follows the School was conducted in the framework of five sections:

ћ         Hydrodynamics and heat-and-mass transfer in laminar and turbulent flows;

ћ         Heat-and-mass transfer in power equipment;

ћ         Heat-and-mass transfer in mechanical engineering and power engineering;

ћ         Enhancement of production and processing of hydrocarbon raw materials;

ћ         Ecology and energy saving.

Leading specialists of corresponding areas delivered their lections at the sections: "Hydrodynamic and thermal processes in pulsating flow" (I.A.Davletshin, Cand. tech. sci., RCPEP), "Topology and heat transfer of separated turbulized flows behind obstacles" (N.I.Yarigina, Leading Scientific Associate, Cand. tech. sci., Thermophysics Institute SB RAS), "Resource and energy saving during reagent preliminary water purification at thermal power plants" (N.D.Chichirova, Dr. tech. sci., Prof., Kazan State Power Engineering University), "Mathematical modeling and optimization of water-cooling towers" (V.L.Fedyaev, Dr. tech. sci., Prof., MEI KSC RAS).

The majority of papers were submitted at the section of Hydrodynamics and heat-and-mass transfer in laminar and turbulent flows. Problems of numerical and experimental research of hydrodynamic and heat transfer were considered. Research works conducted at well-established scientific schools of Thermophysics Institute (TI) SB RAS, MEI KSC RAS, and RCPEP KSC RAS were traditionally on a high level. Large amount of reports dealt with simulation of flows and processes using both commercial codes and numerical algorithms developed by the authors themselves. One of the most interesting works - "Heat transfer in a round pipe with different ratios of sudden expansion" - was delivered by T.V.Bogatko (TI SB RAS). The results of numerical simulation of turbulent separated flows with heat transfer using FLUENT 6.2 package were submitted. The shear-stress transport (Menter's model) was applied in the calculations. The verification of technique was carried out and effect of duct expansion degree on location of reattachment points and maximal heat transfer was demonstrated.

The audience expressed heightened interest towards the papers delivered by D.Yu.Toporkov, T.F.Khalitova, A.I.Davletshin (MEI KSC RAS) which covered the problem of bubble collapse under the influence of acoustic disturbances. The interest followed from discovery of single bubble fluorescence phenomenon which is believed to help in development of technique for thermonuclear fusion reaction initiation.

Also great interest was attracted by experimental research of acoustic flows of gas and two-fractional mixtures in pipes (reports by A.V.Repin, E.A.Utkina, N.V.Sonin, L.A.Tkachenko, and A.A.Nikiforov from MEI KSC RAS).

Among the others organizing committee made special mention of report delivered by D.Yu.Starodumova (TI SB RAS) "Measurements of mean and fluctuating velocity fields and concentrations in two-phase gas-drop jet using PIV system". The author mastered the technique of phase separation by intensity of reflected signal in Particle Image Velocimetry (PIV) applied to the research. New data were obtained concerning influence of small concentrations of disperse phase on mean and fluctuating flow parameters of self-similar part of two-phase submerged jet. It was demonstrated that the presence of large drops in the flow decreased fluctuation intensity of gas phase.

At the section of Heat-and-mass transfer in power equipment the problems were discussed concerning simulation and research techniques for operating modes of equipment and thermo-technological layouts of heat supply systems, thermal power plants, plants of petrochemical and metal industries and their efficiency evaluation. In particular simulation of aerodynamic, hydrodynamic, and heat transfer processes in two-phase mediums, boiler plants, combustion chambers, and water-cooling towers were considered.

The paper by L.M.Magazinnik, N.N.Kovalnogov (Ulyanovsk State Technical University) which dealt with numerical analysis effect of inertial particles precipitation on temperature restoring coefficient of high-speed dispersed flow was specially mentioned. The authors developed mathematical model and calculation technique which laid the foundation for conducted numerical analysis. The technique and software had been tested. It was shown that in general the calculation adequately described the features of exchange processes in dispersed boundary layer. According to the results, restoring coefficients in dispersed flows significantly differ from those in uniform gas flow.

Heat-and-mass transfer in mechanical engineering and power engineering section included papers on mathematical modeling and experimental research. The problems were discussed concerning gas dynamics and heat transfer in rocket engines, thermal screen for the case of blowing through the pores, problems of heat transfer enhancement in ducts with transversal knurling, in shell-and-tube and plate-type heat exchangers, heat and mass transfer and critical behavior in polymerization reactors, etc.

Great interest was attracted by P.N.Saushin's (Ighevsk State Technical University) paper which covered the research of gas dynamics in nozzles of nontrivial geometry. The author carried out calculations of 3D turbulent flows of viscous compressible gas in nozzles with variable throat, established shock-wave flow pattern and defined the lateral force depending on location of a step in the throat. The testing showed that the shock-wave flow pattern obtained numerically was in sufficient agreement with experiment.

At the section of Enhancement of production and processing of hydrocarbon raw materials the development of techniques, equipment and technologies for enhancement of difficult-to-produce hydrocarbon raw materials production which would provide decrease of material and energy expenditures per product unit was considered. Application of integral impact on a ledge was called a promising trend of enhancement of productive capacity of oil and bituminous ledges. Because of oil depletion and abrupt increase of its cost more and more attention is paid to heavy crude, natural bitumen, coal and gas hydrates as alternative sources of fuel.

At the fifth section Ecology and energy saving urgent problems of operation of power and industrial objects and their impact on environment were discussed. A number of papers dealt with the problems of heat-and-power equipment's service life prolongation with some variants of remedial technologies based on numerical and analytical solution at different loading conditions aiming at increasing safety and decreasing technogeneous and technological risks. The issues of recycling of air pollutants in urban areas, sewage sludge in different technological processes, and organic waste of cattle-breeding complexes were discussed. Methods of Volga water treating using coagulation and flocculation were considered.

Reports were also submitted which dealt with development of thermodynamic effectiveness evaluation methods for petrochemical plants and objects of midget power engineering basing on exergic analysis. Engineering solutions concerning automated control of house heating and optimization of house heat consumption were considered and heat insulating properties of house frame filling were studied.

Among the best papers the organizing committee marked out the report "Computed evaluation of stressedly-deformed mode of mounting holes of the 21^st rotor stage of T-100/120-130 steam turbine allowing for various remedial technologies" which was delivered by R.A.Sitdikov who represented the group of authors from RCPEP KSC RAS. In order to substantiate possible remedial technologies applied to rim disk part the authors carried out analysis of stressedly-deformed mode at isolated rivet hole for standard and modified geometry resulting from working loads.

Great interest was attracted by the paper by L.V.Ganina, E.R.Zvereva (Kazan State Power Engineering University) "Improvement of environmental safety of masut equipment at power plants". The authors proposed novel technique for mazut ecological performance improvement with the help of multifunctional additive obtained from waste products of heat-and-power and chemical manufactures. The additive allows improvement of anticorrosive, depressory and viscous properties of mazuts keeping constant caloricity and therefore significantly decreasing the amounts of emitted air pollutants and increasing reliability of heat-and-power equipment and its service life.

High level of delivered reports was stressed at the final conference meeting. The decision of organizing committee which was made on initiative of Nadezhda Alexandrovna Alemasova and supported by KSC RAS management was announced to institute Academician V.E.Alemasov's Prize which since 2009 will be awarded to the best young Russian scientists for their research in the area of heat-and-power engineering. At the moment the Statute of V.E.Alemasov's Prize is being elaborated.